Jar



T. w. BELL JAR Filed June 29, 1929 1 J 5 H 5 M "J 7 G flu J \l m n75 n 5 6 w 9 8 d w 1 r 9 a .w m 5 4 8 57 ///////fi/ ////4 Thomas W. Bell INVENTOR ATTORNEY Patented July 7, 1931 JAR 'i i li. ;inven ion relatestoaid i l jar, fo ke ping. the dril ing; toolsi nm ck ng. du ng-wel d ling, ieifis ing.janfo loosenv ing a string of tools accidentallystuckin a Well- Flt ;&. Il lg theebi eats. oi the inven n to p vid a e'e of the type descri e whi will permit vthe string to have a double .swivj action .;at {the jar, which will provide Qfor rapid vand easy displacement ofiwater, -.,slus h ,or detritus caught within the jar, and. hence insure I efficient jarring action which may bere di y grasp d y fi h n 0 0 .1 e r m val, if br ken in the hol hich may he made. initially of, maximum strength,

houg h v ng m ximum ease o manipnlation; which may be cheaply and economically,r,ep aired end replaced when broken or 1 were andavh ch mayb menufe tur dwithzo'outqvelding any ofthe'parts. As far as I am aware, all pr or j arsl have, been deficient in onc armor e. of .the ahove, mentioned desirable. characteristics.

, To this end the. invention in a broad aspect 'oLits-preferred.form, consists ofan upper element fornattachment to .a tool string {and havinga head thereon, .a lower element-having a reversely placed? head, these elements .ceepe ting wit s eeve whi enclose both heads to permit 7 free .rotetion between the parts d limited r-reciprocatory movelne it e enon e emfentnn th l ve- The sleeve is {provided with a vertical slot ;of

.such extent that the 'water slush or. ;detritus I i thehol fi di g tswayin eth space between th he de e eme m y reedily move therethrough without clogging when the tool-string is reciproa The invention further consists in the novel arrangement, combination and construction of parts more fully hereinafter described and shown in the drawings.

In the drawings: Fig. 1 is a sectional view of a preferred "embodiment of the invention.

Fig. 2 is a similar view of a modified form. Fig. 8 is a view showing a sleeve in the course of its manufacture.

Referring now to the drawings there is 59 shown at 1 an upper element having a.

:229- Seria threaded shank 2 for connectingthe,jarto the usn-al ropesecket or sinkenfbar ofja tool string. The main body of elemental ispro vided with arestricted neck gendaheaded v portion fLWliiCh hasa limited reciprocatory movement ,within the sleeve .l-rlowerclcment 6 is provided,tojthe bottom of which a sinker bar onother tools be attached if desired this element havi'n a,nccl 7 and a head 8 somewhat similar to 60 the 1 -rts3. and 4.1 of the upperelemenhjbut I'GYQZsGlXlJlElQ-Gd and'of le'ss extent.

shown, th le v a theextremetop and boti om; thereof is provided with a; thicker wall; 9 end 10, closely, fitting the necks ;3 Y and 7 respectively, tliethree paljtsfiitillg eg ther, h w r, s as t .pe iiit {a w' velling aC l l' .OI fl, tat o be ween them. i i I Th ev 5 i revide a .0ne,o n0 'e-m places with an elongated slotor slots ll of n xtent b t n ia y. equaLto the d stance between the opposingfaces of heads 4 and 8, and oflsubstantial widthso as to permit rapidniovement of water, slush ordetritus 7 therethnough, when the head ereciprocates for a jar asthe tool string frequent-1y operates under water or therffiush'ing fluid;

In'Fig. 1, thelower thickened ivall portion 1001? the sleeve 5gis of substantially 'theex so tent of theneck 7, sothat no reciprocation canteke place between these parts, thus the joint between thesleeve and the lower element constitutes simplyv a swivel to prevent kinking of the string. or line.

{Should the head 8 pull off .orthe element break zlinywhere in the neck 7, a'fishing tool can readily grasp the stud 112 and the .remai der of the tools may be lifted fromthe hole. It then becomes a simple pr.oblem' to 9 machine or'tnrn another neck on'the stud l2, sothat the lower element may'be,readily salvaged and used again.

Should the sleeve break at any place; the lower portion may be removed 1e use 016 the ordinary fishingspear, or socket, and the entire sleevereplace'd with a new device. "The entire jarring effect is produced by the relative up or down movement between the upper element 1 and'the sleeve5. In'mu movement will cause the upper shoulder 14: t

7' solid matter clogs up reliet ports of the the position shown in Fig.1 the parts are at the limitof their downward position and 1 a down jar has just been imparted to the string by slackening the line and dropping the upper shoulder 13 onto the correspondingtop of the sleeve 5.. A reverse or upward of the; head 4 to aragainst the lower shoulder- 15 of the sleeve enlargement 9, and a lifting action is given the tools. Such action is continued until the frozen tool is loosened.

In operat10n tus finds its way into the sleeve, and this type shownin the patent to Bell, No. 1,27 7 683, so that free, quick andfull reciprocationof the partsis prevented. In the present'f construction,however, a slot or slots 11 are located in the' side wall of the sleeve 5' of a "height substantially equal to the 6X1 treme distancebetween heads l and 8. Thus regardless of whether the headis movmg up or down, the water, slush or mixture 1 thereof with sandand' grit or the like'may haveready and quick access to or be expelled.

fromv the sleeve Without producing a cush ioning efi'ect and decreasing the effectiveness of thejarring action. lhe slot 11 is of such f; width that it cannot be clogged by the detritus occurring'in ahole.

"Obviously, the parts may be reversed as shown in Fig.2 in which the'upper element 161s solely aswivehand the jarring actlon is secured by impact between the sleeve 5 4o may be forged, rolled or swaged in place and-thelowerelement 1 7 the sleeve 5 being reversely placed as to the combination of In either of the above forms, the sleeve upon the two heads, or'it may be interiorly bored to the proper configuration, and then f .workedton to the upper and lower elements.

hoa se of *manufacture. v

1 may be formed from solid stock and lllilfil'lorly bored throughout as at A to thegreat- InFig. 3 there is illustrated a sleeve-in its Such an element est head "diameter. An interior rean er is than inserted and the portions .13 formed 'Jthereby. 'Upon subjecting the slee've to ,a

swaging operation aroundthe heads 4 and Y 8themetalis made to flow and the shoulder configurations'shown in Figsjl or 2 result.

, This forging operation gives a cylindrical shape to theexterlor of the sleeve and forms; a

' the interiorf shoulders 15,

The above is given as one satisfactory method of producing the sleeve although" obviously we do notwish to bevlimited toy an element so made.

: vThey'above combination vprovides a tool 7 it has been found that a con-V siderable amount of silt, grit or other detr1 "that it is a much simpler and cheaper construction to provide a sleeve connection between the headed elements than that shown in Patent No. 1,277,683 above referred to, if for no other reason than that it breakage of thesleeve occurs, anew sleeve'may be replaced at a comparatively small cost, while if one of the tubular parts ofthe'above patent gives way the entire element of it is a part'must' be replaced.

What Iclaimis; V V r '1. A drill jar comprising an upper and a; lower headed element, a sleeve connecting the elements and enclosing the heads thereof, the'three'p'arts being coup'ledfor free rotation, one head being mounted on an which elongated neck to permit reciprocation bethe head ofeach element, ,one of thetl1ick-l .i

ened' wall portions being, of an extent sub stantially equal to that of the neck of one element, whereby rotation maybe had between the's'leeveand thatfeleinenhbut re ciprocato'ry movementtherebetween is prevented. I s

13. A drill jar'comprising an upper element having a body,-a restricted neck and a head,

a lower element havinga body, a restricted neck, and a head, a sleeve connecting the two elementsand having a thickened wall o'f'e'ach element, one of the, thickened wall portions being of an extent substantially equalto that of the neck of oneelement, whereby rotat-ionmay be 'had'between the sleeve and that element, but reciprocatory movement therebetweeniis prevented, said sleeve also having another thickened wall portion of an extent less" than that of the neck of the other element, whereby rotation and reciprocation may be had between the sleeve 'and thatelement. l

"In testimony whereof, have hereunto subscribed my name this 21stday of May',

f THOMAS W. BELL.

having many pointsof superiority overthose now used and in addition to the advanta'ges already pointed out, it. will be seen portion lying between the bodyand the head a 

